Sash balance



Sept; 16, 1924. r 1,508,863

G. c. WEBSTER 'ISASH BALANCE I Filed Qqt. 21 192 2 v lflllliiff I v wser Patented Sept. 16,

GEORGE C. WEBSTER, OF LOS ANGELES, GALTFQRNIA. v

SASH BALANCE.

Application filed October 21, 1922. Serial No; 595,948.

To all whom it may concern:

Be it known that I, GEORGE C. WEBSTER, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Sash Balances,of which the following is a specification.

-This invention relates to sash balancing means, and has-for its objectto improve the type of sash balance that is disclosed in a parent issuedNovember 27, 1917, No. 1,248,- 22

More particularly it is an object of the present invention to rovide asimplified and easily acting t pc sash supporting means, and particulary it is an object to provide a sash balancing means consisting of fewand substantial parts including a spring adapted to be wound and unwoundby the action of the sash. L

Other objects and advantages will be made manifest in the followingspecification of an embodiment of the invention illus trated in theaccompanying drawings, wherein- I Figure 1 is aview showing in elevationand partial section fragments of upper and lower sashes combined withthe improved su porting means.

'g. 2 1s a longitudinal section through one of the sash supportingmeans'detached from the window.

,Fig. 3 is a plan of the supporting device.

The invention is shown as combined with an upper vertically sliding sashand a lower similarly sliding sash 11, each of which has its side stiles12 lon 'tudinally channeled for a suitable length; t e top and bottomends of the rails 13 closing the ends of the channels in the stiles. Thepresent invention consists broadly of a tube 15 of suitable diameter andlength and being rovided with a helical groove 16 of a suitab e pitch;the groove preferably being of arcuate cross section.

An inexpensive form of the device is shown wherein the tube 15 has thehelical groove rolled or inwardly depressed therein.

The up er and of the tube, or as it may be nailed t is roller 15, isprovided with a cap 3;, and the lower end is provided with a similar cap18 each of cup form; the lower being shown as provided with a struckdown lug 19 to receive and hold the contiguous end of an aggropriatelystrong spring 20 arranged wit the roller 15 and. surroller 15 about itsown axis.

- upper bracket 23 having a downwardly extending arm 24 which may behailed as at 25 to the bottom of the. channel in the stile 12, and thebracket has an upwardly bent outer end 26 which is secured as by a nail27 to the end of the top rail 13 of'a sash. The bracket 23 is providedwith an elongated aperture 28 to receive the noncircular or flat end 21of the spindle 21 and therefore hold this against rotation.

A somewhat similar lower bracket 30 is secured to the bottom stile ofthe window sash 11 and has a socket portion 31 to rebrackets thereforesupport the spindle 21 in upright osition and permit the rotation of ther0 ler or tube 15 about the spindle.

Countersunk in the adjacent vertical element 33 of the window frame is adevice consisting of a collar 34 rotatably fitting about the, roller 15,the collar having the transversely extending shell 35 which 1scountersunk in the window frame 33 as clearly shown in Fig. 1. The shellor lateral extension 35 is provided with a ball race 36 and in it isarranged an annular series of balls 37 which support centrally a largeroller engaging ball 38,,this having a diameter complementary to thearcuate helical groove 16 in the roller 15. It will be seen that by thisconstruction theacontact rollerv 38 will freely roll on its annularseries of ball bearings 37 during vertical movement of the roller 15with the respective window sash.

"ceive the lower end of the spindle 21. These In action, when the sashis raised or lowered, the nonshifting roller engaging ball 38 isefiective to cause the rotation of the This rotation of the roller onthe downward movement'of the sash causes the spring 20 to be wound toincrease its tension and therefore form an effective counterbalance andsupport to hold the window sash in any adjusted position 1n its guides.s

From the above it will be seen that the present improvement enables theeasy action of the sash due to the antifriction support of the rollerengaging ball 38. It will also be seen that I have provided a windowsupporting means or counterbalance of extreme simplicity and few andsubstantial parts.

The brackets are shown as provided with slight projecting beads 30 whichare pro-.

vided for the purpose of having a running contact with the window framesand taking all of the wear, and for providing for operation of the sashwith minimum friction.

Further embodiments, modifications and changes may be resorted to withinthe spirit of the invention as here claimed.

What is claimed is:

1. A: yielding sash counterbalance comprising upper and lower brackets,a roller adapted to be countersunk in a stile of a window sash, aspindle extending through; the roller and adapted to be mounted and heldagainst rotation in said brackets, a spring surrounding said spindle andsecured thereto and inclosed in said roller, and being attach at one endthereto, and a ball and race device attachable to a contiguous member ofthe window. frame for supporting a ball engaging and causin the rollerto rotate during movement 0 the sash and thereby vary the reaction ofthespring.

2. A yieldingsash counterbalance comprising upper. and lower brackets, aroller adapted to be countersunk in a stile of a window sash, a spindleextending through the roller and adapted to be mounted and held againstrotatlon in said brackets, a spring surrounding said spindle and securedt ereto and inclosed in said roller, and being attached at one endthereto, and means attachable to acontiguous member of the window framefor engaging and causing the roller to rotate during movement of thesash mosses and thereby vary the reaction of the spring, said meansincluding a ball bearing adapted to be held in said position by thewindow frame, and aroller engaging central ball supported on the ballbearing.

3. In a spring controlled, roller sash counterbalancing means, a rollerhaving a peripheral, helical groove, a ball engaging said groove, whichis free to turn upon a nest of balls within a ball race.

4:. In a spring controlled, roller sash counterbalancing means, atubular roller having a peripheral, helical groove depressedin its wall,end caps applied to the ends of the roller, a spindle extending axiallof the roller and journaled in the caps an extending beyond the same,and a spring surroundin the spindle and attached at one of its endsthereto and attached at its opposite end to one of the caps so that uponrelative rotation of the roller and the spindle reaction is producedfrom the spring.

5. In a spring sash balance, a means for mounting comprising bracketsfastened on the inner sides of the top and bottom rails of the window,the rails forming ends for a channel within the window stile in whichthe sash balance is held, said brackets having recesses receiving endsof the sash balance. V

6. In a spring sash balance, a means for mounting comprising bracketsfastened on the inner sides of the top and bottom rails of the window,the rails forming ends for a channel within the window stile in whichthe sash balance is held, said brackets having bead portions in runningcontact with the window frame.

In testimony whereof I have signed my name to this specification.

Greece 0. wnns'rna.

